(draft pr) implement basic erc721 structure for certificates

backend-sc/src/components/certificate/certificate.cairo

@@ -1,2 +1,93 @@
 #[starknet::component]
-mod NFTComponent {}
+mod NFTComponent {
+    // Starknet imports
+    use starknet::{ContractAddress, get_caller_address};
+
+    // Internal imports
+    use carbon_locker::components::certificate::interface::INFTComponent;
+    use carbon_locker::components::certificate::interface::LOCKER_ROLE;
+    use carbon_locker::components::locker::interface::Lock;
+
+    // Roles
+    use openzeppelin::access::accesscontrol::interface::IAccessControl;
+    use openzeppelin::access::accesscontrol::AccessControlComponent;
+    use openzeppelin_access::accesscontrol::AccessControlComponent::InternalTrait as AccessControlInternalTrait;
+
+    // SRC5
+    use openzeppelin::introspection::src5::SRC5Component;
+    use openzeppelin::introspection::interface::{ISRC5Dispatcher, ISRC5DispatcherTrait};
+
+    // ERC721
+    use openzeppelin::token::erc721::{
+        ERC721Component, ERC721HooksEmptyImpl, ERC721Component::InternalTrait as ERC721InternalTrait
+    };
+
+    mod Errors {
+        const INVALID_ROLE: felt252 = 'Only Locker is allowed';
+    }
+
+    #[storage]
+    struct Storage {//metadatas: Map<u256, Lock>
+    }
+
+    #[embeddable_as(NFTComponentImpl)]
+    impl NFTComponent<
+        TContractState,
+        +HasComponent<TContractState>,
+        +Drop<TContractState>,
+        impl ERC721: ERC721Component::HasComponent<TContractState>,
+        +SRC5Component::HasComponent<TContractState>,
+        +IAccessControl<TContractState>,
+        impl AccessControl: AccessControlComponent::HasComponent<TContractState>,
+    > of INFTComponent<ComponentState<TContractState>> {
+        fn mint(
+            ref self: ComponentState<TContractState>,
+            to: ContractAddress,
+            token_id: u256,
+            lock_data: Lock
+        ) {
+            self.assert_only_locker(LOCKER_ROLE);
+            let mut erc721_component = get_dep_component_mut!(ref self, ERC721);
+            erc721_component.mint(to, token_id);
+        }
+
+        fn burn(ref self: ComponentState<TContractState>, token_id: u256) {
+            self.assert_only_locker(LOCKER_ROLE);
+            let mut erc721_component = get_dep_component_mut!(ref self, ERC721);
+            erc721_component.burn(token_id);
+        }
+    }
+
+    #[generate_trait]
+    impl InternalImpl<
+        TContractState,
+        +HasComponent<TContractState>,
+        +Drop<TContractState>,
+        impl ERC721: ERC721Component::HasComponent<TContractState>,
+        +SRC5Component::HasComponent<TContractState>,
+        +IAccessControl<TContractState>,
+        impl AccessControl: AccessControlComponent::HasComponent<TContractState>,
+    > of InternalTrait<TContractState> {
+        fn initializer(
+            ref self: ComponentState<TContractState>,
+            locker_address: ContractAddress,
+            token_name: ByteArray,
+            token_symbol: ByteArray,
+            token_base_uri: ByteArray,
+        ) {
+            let mut access_control = get_dep_component_mut!(ref self, AccessControl);
+            access_control.initializer();
+            access_control._grant_role(LOCKER_ROLE, locker_address);
+
+            let mut erc721_component = get_dep_component_mut!(ref self, ERC721);
+            erc721_component.initializer(token_name, token_symbol, token_base_uri);
+        }
+
+        // Only the Locker address is allowed to mint and burn a token
+        fn assert_only_locker(self: @ComponentState<TContractState>, role: felt252) {
+            let caller = get_caller_address();
+            let has_role = self.get_contract().has_role(role, caller);
+            assert(has_role, Errors::INVALID_ROLE);
+        }
+    }
+}

backend-sc/src/components/certificate/interface.cairo

@@ -1,4 +1,11 @@
 use starknet::ContractAddress;
-/// Implement NFT Certicate. Only Locker can mint, burn and update metadata.
 
+const LOCKER_ROLE: felt252 = selector!("Locker");
 
+use carbon_locker::components::locker::interface::Lock;
+
+#[starknet::interface]
+trait INFTComponent<TContractState> {
+    fn mint(ref self: TContractState, to: ContractAddress, token_id: u256, lock_data: Lock);
+    fn burn(ref self: TContractState, token_id: u256);
+}

backend-sc/src/lib.cairo

@@ -7,4 +7,8 @@ mod components {
         mod interface;
         mod locker_handler;
     }
+    mod certificate {
+        mod interface;
+        mod certificate;
+    }
 }

backend-sc/tests/lib.cairo

@@ -1,2 +1,6 @@
 mod tests_locker;
 mod tests_utils;
+mod tests_certificate;
+mod mocks {
+    mod erc721;
+}

backend-sc/tests/mocks/erc721.cairo

@@ -0,0 +1,65 @@
+use starknet::ContractAddress;
+
+#[starknet::contract]
+mod MockERC721 {
+    use starknet::ContractAddress;
+
+    // SRC5
+    use openzeppelin_introspection::src5::SRC5Component;
+    // ERC721
+    use openzeppelin_token::erc721::{ERC721Component, ERC721HooksEmptyImpl};
+    // Access Control - RBA
+    use openzeppelin::access::accesscontrol::AccessControlComponent;
+    // Certificate NFT Component
+    use carbon_locker::components::certificate::certificate::NFTComponent;
+
+    component!(path: ERC721Component, storage: erc721, event: ERC721Event);
+    component!(path: SRC5Component, storage: src5, event: SRC5Event);
+    component!(path: AccessControlComponent, storage: accesscontrol, event: AccessControlEvent);
+    component!(path: NFTComponent, storage: nft_component, event: NFTComponentEvent);
+
+    // ERC721 Mixin
+    #[abi(embed_v0)]
+    impl ERC721MixinImpl = ERC721Component::ERC721MixinImpl<ContractState>;
+    impl ERC721InternalImpl = ERC721Component::InternalImpl<ContractState>;
+    // Access Control
+    #[abi(embed_v0)]
+    impl AccessControlImpl =
+        AccessControlComponent::AccessControlImpl<ContractState>;
+    impl AccessControlInternalImpl = AccessControlComponent::InternalImpl<ContractState>;
+    // NFT Certificate
+    #[abi(embed_v0)]
+    impl NFTComponentImpl = NFTComponent::NFTComponentImpl<ContractState>;
+    impl NFTComponentInternalImpl = NFTComponent::InternalImpl<ContractState>;
+
+    #[storage]
+    struct Storage {
+        #[substorage(v0)]
+        erc721: ERC721Component::Storage,
+        #[substorage(v0)]
+        src5: SRC5Component::Storage,
+        #[substorage(v0)]
+        accesscontrol: AccessControlComponent::Storage,
+        #[substorage(v0)]
+        nft_component: NFTComponent::Storage,
+    }
+
+    #[event]
+    #[derive(Drop, starknet::Event)]
+    enum Event {
+        #[flat]
+        ERC721Event: ERC721Component::Event,
+        #[flat]
+        SRC5Event: SRC5Component::Event,
+        #[flat]
+        AccessControlEvent: AccessControlComponent::Event,
+        #[flat]
+        NFTComponentEvent: NFTComponent::Event,
+    }
+
+    #[constructor]
+    fn constructor(ref self: ContractState, locker_address: ContractAddress) {
+        self.nft_component.initializer(locker_address, "Certificate", "CERT", "data:application/json,");
+    }
+}
+

backend-sc/tests/tests_certificate.cairo

@@ -0,0 +1,139 @@
+// Starknet deps
+
+use starknet::{ContractAddress, contract_address_const, get_caller_address, get_block_timestamp};
+
+// External deps
+
+use snforge_std as snf;
+use snforge_std::{
+    ContractClassTrait, EventSpy, start_cheat_caller_address, stop_cheat_caller_address, spy_events,
+    start_cheat_block_timestamp_global,
+    cheatcodes::events::{EventSpyAssertionsTrait, EventSpyTrait, EventsFilterTrait}
+};
+
+// ERC721 Components
+
+use openzeppelin::token::erc721::interface::{
+    IERC721Dispatcher, IERC721DispatcherTrait,
+    IERC721MetadataDispatcher, IERC721MetadataDispatcherTrait
+};
+
+// Internal interfaces
+use carbon_locker::components::certificate::interface::{
+    INFTComponentDispatcher, INFTComponentDispatcherTrait
+};
+use carbon_locker::components::locker::interface::Lock;
+
+// Contracts
+use super::mocks::erc721::MockERC721;
+
+// Utils for testing purposes
+use super::tests_utils::{deploy_all};
+
+fn generate_lock_data() -> Lock {
+    Lock {
+        id: 1_u256,
+        user: contract_address_const::<'USER'>(),
+        token_id: 1_u256,
+        amount: 1000_u256,
+        start_time: get_block_timestamp(),
+        end_time: get_block_timestamp() + 1000_u64,
+        offsettable: false,
+        is_offsetted: false
+    }
+}
+
+/// Test the intializer function
+#[test]
+fn test_certificate_initializer() {
+    let (_, _, _, _, _, certificate_address) = deploy_all();
+    let erc721_metadata = IERC721MetadataDispatcher { contract_address: certificate_address };
+
+    let name = erc721_metadata.name();
+    assert(name == "Certificate", 'Token name mismatch');
+
+    let symbol = erc721_metadata.symbol();
+    assert(symbol == "CERT", 'Token symbol mismatch');
+}
+
+#[test]
+fn test_mint() {
+    let (_, locker_address, _, _, _, certificate_address) = deploy_all();
+    let certificate = INFTComponentDispatcher { contract_address: certificate_address };
+
+    // Call with locker permissions
+    start_cheat_caller_address(certificate_address, locker_address);
+
+    // Mint the token
+    let user_address: ContractAddress = contract_address_const::<'USER'>();
+    let token_id: u256 = 1;
+    let lock_data = generate_lock_data();
+    certificate.mint(user_address, token_id, lock_data);
+
+    // Check the user_address balance
+    let erc721 = IERC721Dispatcher { contract_address: certificate_address };
+    let balance = erc721.balance_of(user_address);
+    assert(balance == 1, 'Balance should be 1');
+}
+
+#[test]
+#[should_panic(expected: 'Only Locker is allowed')]
+fn test_unauthorized_caller_mint() {
+    let (_, _, _, _, _, certificate_address) = deploy_all();
+    let certificate = INFTComponentDispatcher { contract_address: certificate_address };
+
+    // Call with user_address permissions
+    let user_address: ContractAddress = contract_address_const::<'USER'>();
+    start_cheat_caller_address(certificate_address, user_address);
+
+    // Mint the token
+    let token_id: u256 = 1;
+    let lock_data = generate_lock_data();
+    certificate.mint(user_address, token_id, lock_data);
+    stop_cheat_caller_address(certificate_address);
+}
+
+#[test]
+fn test_burn() {
+    let (_, locker_address, _, _, _, certificate_address) = deploy_all();
+    let certificate = INFTComponentDispatcher { contract_address: certificate_address };
+
+    // Call with locker permissions
+    start_cheat_caller_address(certificate_address, locker_address);
+
+    // Mint the token
+    let user_address: ContractAddress = contract_address_const::<'USER'>();
+    let token_id: u256 = 1;
+    let lock_data = generate_lock_data();
+    certificate.mint(user_address, token_id, lock_data);
+
+    // Burn the token
+    certificate.burn(token_id);
+
+    // Check the user_address balance
+    let erc721 = IERC721Dispatcher { contract_address: certificate_address };
+    let balance = erc721.balance_of(user_address);
+    assert(balance == 0, 'Balance should be 0');
+}
+
+#[test]
+#[should_panic(expected: 'Only Locker is allowed')]
+fn test_unauthorized_burn() {
+    let (_, locker_address, _, _, _, certificate_address) = deploy_all();
+    let certificate = INFTComponentDispatcher { contract_address: certificate_address };
+
+    // Call with locker permissions
+    start_cheat_caller_address(certificate_address, locker_address);
+
+    // Mint the token
+    let user_address: ContractAddress = contract_address_const::<'USER'>();
+    let token_id: u256 = 1;
+    let lock_data = generate_lock_data();
+    certificate.mint(user_address, token_id, lock_data);
+
+    // Call with user_address permission
+    start_cheat_caller_address(certificate_address, user_address);
+
+    // Burn the token
+    certificate.burn(token_id);
+}